Fill in the response. Read the following conversation:
 * What is the tradition with police uniforms?
 * Following the death of a police officer, other officers will typically cover their badges with a black mourning band.
 * Are there any other interesting aspects about this article?
 * Mourning bands can also be seen worn on May 15, "National Peace Officers Memorial Day." Most police uniforms feature shoulder sleeve insignia in the form of cloth patches embroidered with the agency's name, logo or a heraldic device.
 * Do they have to wear these uniforms?
 * These patches are displayed either on both shoulders, or one.
 * Is there anything else that is important about this article?
 * Individual municipal and county law enforcement agencies in the United States are typically responsible for designing their own uniforms, often with minimal state regulation.
 * Do they choose a particular style?
 * 
As a result, there is no universal form or pattern for American police uniforms.